AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM, Diagnostic DTC:B2417, B2418

DTC Code DTC Name
B2417 Headlight Beam Level Control Motor LH Malfunction
B2418 Headlight Beam Level Control Motor RH Malfunction

DESCRIPTION

The headlight unit assembly (headlight leveling motor) receives a signal from the headlight ECU sub-assembly to operate. The headlight ECU sub-assembly receives a signal indicating the operating conditions of the headlight sub-assembly (headlight leveling motor).

DTC No. Detection Item DTC Detection Condition Trouble Area
B2417 Headlight Beam Level Control Motor LH Malfunction Malfunction in headlight leveling motor LH

  • Headlight ECU sub-assembly LH

  • Headlight unit assembly LH (headlight leveling motor)
B2418 Headlight Beam Level Control Motor RH Malfunction Malfunction in headlight leveling motor RH

  • Headlight ECU sub-assembly RH

  • Headlight unit assembly RH (headlight leveling motor)

WIRING DIAGRAM

B006NCWE02
*1 Headlight Leveling Motor
*2 Headlight Unit Assembly
*3 Headlight ECU Sub-assembly

CAUTION / NOTICE / HINT

Note

After the headlight ECU sub-assembly LH is replaced, vehicle information registration and initialization are necessary.

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs

    2. Turn the engine switch on (IG).

    3. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      OK
      DTCs B2417 and B2418 are not output.
      Result
      Result Proceed to
      OK A
      NG (DTC B2417 is output) B
      NG (DTC B2418 is output) C

    A

    USE SIMULATION METHOD TO CHECK Click here

    C

    CHECK HEADLIGHT UNIT ASSEMBLY RH Click here

    B

  2. CHECK HEADLIGHT UNIT ASSEMBLY LH


    1. Interchange the headlight unit assembly LH with RH and connect the connectors to them.

      for ALPHARD:

      Click here

      for VELLFIRE:

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs

    3. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      Result
      Result Proceed to
      DTC B2418 is output A
      DTC B2417 is output B

    A

    REPLACE HEADLIGHT UNIT ASSEMBLY LH for ALPHARD: REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here
    REPLACE HEADLIGHT UNIT ASSEMBLY LH for VELLFIRE: REPLACE HEADLIGHT UNIT ASSEMBLY LH Click here

    B

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY LH Click here

  3. CHECK HEADLIGHT UNIT ASSEMBLY RH


    1. Interchange the headlight unit assembly RH with LH and connect the connectors to them.

      for ALPHARD:

      Click here

      for VELLFIRE:

      Click here

    2. Clear the DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Clear DTCs

    3. Check for DTCs.

      Click here


      Body Electrical > HL AutoLeveling > Trouble Codes
      Result
      Result Proceed to
      DTC B2417 is output A
      DTC B2418 is output B

    A

    REPLACE HEADLIGHT UNIT ASSEMBLY RH for ALPHARD: REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here
    REPLACE HEADLIGHT UNIT ASSEMBLY RH for VELLFIRE: REPLACE HEADLIGHT UNIT ASSEMBLY RH Click here

    B

    REPLACE HEADLIGHT ECU SUB-ASSEMBLY RH Click here